Gustav Riek "directed excavations at Vogelherd (...) in the summer and autumn of 1931. Over a period of three months the excavation team removed about 300m³ of Pleistocene sediments from the cave and recovered artefacts from four Middle Palaeolithic layers and four Upper Palaeolithic layers. Riek published 12 stratigraphic profiles and detailed descriptions of the sediments from the cave." (Conard, Grootes & Smith 2004: 198-199).